Vortex Plastic Motion in Twinned Superconductors

Details Vortex Plastic Motion in Twinned Superconductors Vortex Plastic Motion in Twinned Superconductors

1996-07-25

arxiv.org/abs/cond-mat/9607182v1

Phys. Rev. Lett. 77 (1996) 3625-3628

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.77.3625

We present simulations, without electrodynamical assumptions, of $B(x,y,H(t)), M(H(t))$, and $J_c(H(t))$, in hard superconductors, for a variety of twin-boundary pinning potential parameters, and for a range of values of the density and strength of the pinning sites. We numerically solve the overdamped equations of motion of up to 10^4 flux-gradient-driven vortices which can be temporarily trapped at $\sim 10^6$ pinning centers. These simulations relate macroscopic measurements (e.g., M(H), ``flame'' shaped $B(x,y)$ profiles) with the underlying microscopic pinning landscape and the plastic dynamics of individual vortices.

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